Rotating table for radial drills



June 23, 1925- W. T. SEARS ROTATING TABLE FOR RADIAL DRILLS Filed July 28, 1921 Patented June 23, 1925.

UNITED, STATES,

1,543,23 PATENT. OFFICE. 5

WIL ARD 'r. snnns, or MONTCLAIR, NEW JERSEY, AssIGNoR o NILES-BEMENT- POND COMPANY, on NEW YORK, N. Y., A coRroRATIoN on NEW JERSEY.

ROTATING TABLE FOR RADIAL DRILLS.

Application filed July 28,

To all whom it may concern."

Be it known that I, WVILLARD 'T. SEARS, a citizen of the United States, residing at Montclair, in the. county of Essex and State of New Jersey, have invented certain new and useful Improvements in Rotating Tables for Radial Drills, of which the following is a specification.

This invention relates to drilling machines and particularly to mechanism adapted to be applied to a standard radial drilling machine for conveniently rotating a work chuck or table in operations requiring such procedure. Accordingly, the primary object of the invention is to provide comparatively simple means for performing the function stated, suchmeans being adapted to be readily and conveniently appliedto the usual or standard types of radial drilling machines.

More specifically, it is an object of'the in.- vention to provide a drilling machine 'attachment for conveniently rotating the work chuck or table from a spindle driving shaft on the drillsupporting mechanism, such attachment being adapted to be operated from either the column or armshaft forming the usual standard parts of a drilling machine.

With these and other objects in View, my invention consists in the features of corn struction and operation set forth in the following specification and illustrated in the accompanying drawing. In such drawing annexed heretov and forming a part of this specification, I have shown certain embodiments of my invention as applied to radial drilling machines but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose. Referring to the figures of the drawing: Figure 1 is an elevation of one type of radial. drilling machine showing my invention embodied therein. Fig. 2 is a fragmentary side elevation showing another type of radial drilling machine having my invention embodied therein. i

Fig. 3 is a sectional plan view of Fig. 2. In performing certain drilling operations, particularly in metal which is not homogeneous or in which there are blow-out ing more clearly illustrated in Fig.

1921. Serial No. 488,233.

holes, to insure the hole being central of the work, it is desirable to rotate the work while it is being drilled. In the drawing, Ihave shown simple mechanism somewhat in the form of an attachment for'performing this function. In certain types of, radial drills, it will, be convenient to drive this mechanism from the shaft extending horizontally along the radial arm while in other typesthe same may be more conveniently driven from the shaft extending vertically at one side of the column. It may also be desirable in some'instances to drive the same from a relatively small individual electric motor.- In the drawing, I have illustrated these several methods of driving the attachment which drawing will now be described in detail. I H i j V Referring to Fig. 1 of the drawing, 1 indicates the bed of a radial drilling machine on the base 2 of which is mounted for ro-,

a drill supporting column lever 4 is provided for securing the column against rotation. A drillsupporting arm 5 is illustrated as mounted for vertical movement on the column and a drill supporting element 6' is mounted for horizontal movement along the arm. A motor 7 is provided on the arm for tary adjustment 3. A clamping operating the drilling mechanism, including the rotation of thedrill spindle S from the arm shaft 9. g

A work support or chuck 10 is rotatably mounted on the bed, a piece of work W to be drilled being illustrated as secured thereon. Adjacent and preferably to the rear of the work support, I mount a horizontal shaft 11 in a bearing 12 on the bed and in a bracket 13 on the stationary base 14 of the work support. A worm 15 is secured to-the shaft between two bearings on'the bracket "13 and engages exterior worm teeth 16in the work support, the said two bearings bep'ulley 17 on the end of the shaftll is op- "eratively connected to a pulley18 on the-end of the arm shaft 9 Such mechanismprovides a very convenient means for driving the attachment in drillby means of a'belt' 19.

ing machines of the type illustrated in Fig. 1 wherein the power element comprises a motor, as the motor 7, on the drill supportmg arm.

Another type of radial drilling machine is illustrated in Figs. 2 and 3. In this machine, the main power mechanism comprises ashaft 21 entering the base of the machine and operat1vely connected to the gearin 22 at the top of the column through the usual column shaft 23. A shaft 2a, illustrated as extending vertically of the column outside thereof, is driven from the gearing 22, a bevel gear 25 splined to' shaft 24 operatively engaging a bevel gear 26 on arm shaft 27 which is connected to the drill spindle for rotating the same. In this type of machine, the work support may be conveniently rotated from this shaft 2%. As a convenient means for so driving the same, I have illustrated the worm shaft 11 as'supported in bearings 28 and 29 on the bed and the worm 15 thereon as mounted on the bracket 13 between the bearings 13 and 13*. A pulley 30 on the shaft 11 is operatively connected to a pulley 31 on the shaft 2% by means of a belt 32 whereby the work support 10 is rotated from the vertical shaft 24.

lVhat I claim is:

1. In a drilling machine, the combination ofabed, drill supporting mechanism comprising a vertical column on the bed and ahorizontal arm supported solely by and movable vertically on the column, drilling mechanism including a drill spindle carried by the arm, a shaft carried by the said supporting mechanism for driving the spindle, "power means operatively connected to the shaft for rotating the same, a rotary work support on the bed, a shaft having a worm thereon operatively engaged with a worm wheel on the work support, and means providing an operative connection between the two shafts for continuously rotating the work support at a relatively slow speed.

2. In a drilling machine, the combination of a bed, drill supporting mechanism comprising a vertical column on the bed and a horizontal arm on the column, drilling mechanism including a drill spindle carried by the arm, a shaft carried by the said supporting mechanism, power means operatively connected to the shaft and spindle for rotating the same, a rotary work support on the bed, a shaft operatively connected to'the work support for rotating the same at a relatively slow speed, and an operative connection comprising a pulley on each of the said shafts, and a belt connectingthe pulleys for continuously rotating the second named shaft and the work support.

v 3. In a drilling machine, the combination of a bed, a vertical column mounted thereon, a horizontal arm vertically adjustable on the column, drill supporting mechanism mounted on the arm, a drill spindle mounted on the said mechanism, a driving shaft mounted longitudinally on the arm and operatively connected to the drill spindle,

power means for operating the shaft, a rotary work support mounted on the bed and beneath the arm, a shaft operatively connected to the work support for rotating the same, and an operative connection between the two shafts whereby the work support is continuously rotated from the said power means.

l. In a drilling machine, the combination of a bed, a vertical columnmounted thereon, a horizontal arm carried by the column, drill supporting mechanism adjustable horiz'ontally along the arm, a drill spindle mounted on the said mechanism, a driving 7 shaft mounted longitudinally on the arm and operatively connected to the drill spindle, power means for operating the shaft, a rotary-work support mounted on the bed and beneath the arm, a shaft operatively connected to the work support for rotating the same, and an operative connection between the two shafts comprising a pulley on each shaft connected by a beltwhereby the work support is continuously rotated from the said power means.

5. In a drilling machine, the combination of a bed, a vertical column mountedithereon, a horizontal arm carried the column, drill supporting mechanism adjustable :hor zontally along the arm, a drill spindle mounted on the said mechanism, a driving shaft mounted longitudinally .on the arm and operatively connected to the drill spindle, power means for operating the shaft, 1

a rotary work support mounted on the .be d and beneath the arm, a shaft having a Worm thereon operatively engaged with a worm wheel on the work support, a pulley on the outer end of the arm shaft, a pulley on the second named shaft, and a belt operativel-y connecting such pulleys whereby the work support is continuously rotated from thearm shaft.

6. In a drilling machine, the combination of a bed, a vertical column mounted thereon, a horizontal arm vertically adjustable .on the column, drill supporting mechanism mounted on the arm at one side of the column, a drill spindle mounted on the said mechanism, a driving shaft mounted longitudinally on the arm and voperatively connected to the drill spindle, a motor on the arm at the other side of the column and operatively connected to the shaft, a rotary worm support mounted .on the bed beneath the arm, a shaft having a worm thereon operatively engaged with a worm wheel on the work support, and an operative connec tion between ,the two shafts whereby the work support is continuously rotated from the motor at a relatively slow speed.

In testimony whereof, I hereto my signature.

. WILLARD r. SEARS. ,1, 

